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Novaculite and Greenschist


Greenschist and Novaculite


Definition

Definition
Novaculite is a dense, hard, fine-grained, siliceous metamorpic rock which is a type of chert that breaks with conchoidal fracture   
Greenschist is a metamorphic rock that is formed under lowest temperatures and pressures and is usually produced by regional metamorphism   

History
  
  

Discoverer
Unknown   
Unknown   

Etymology
From Latin word novacula, for razor stone   
From minerals such as chlorite, serpentine, and epidote, and platy minerals such as muscovite and platy serpentine which are green in color   

Class
Sedimentary Rocks   
Metamorphic Rocks   

Sub-Class
Durable Rock, Hard Rock   
Durable Rock, Medium Hardness Rock   

Family
  
  

Group
Not Applicable   
Not Applicable   

Other Categories
Fine Grained Rock, Opaque Rock   
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock   

Texture

Texture
Banded, Glassy, Rough, Vitreous   
Foliated, Platy   

Color
Black, Brown, Green, Grey, Red, White   
Dark Greenish - Grey, Green   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
No   

Wind Resistant
Yes   
No   

Acid Resistant
Yes   
No   

Appearance
Glassy or Pearly   
Layered and Shiny   

Uses

Architecture
  
  

Interior Uses
Countertops, Decorative Aggregates, Flooring, Interior Decoration   
Bathrooms, Countertops, Decorative Aggregates, Entryways, Homes, Interior Decoration   

Exterior Uses
As Building Stone, Garden Decoration   
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings   

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
Arrowheads, Building houses or walls, Cement Manufacture, Construction Aggregate, Cutting Tool, for Road Aggregate, Knives, Landscaping, Making natural cement, Production of Glass and Ceramics, Rail Track Ballast, Roadstone, Spear Points, Used to sharpen metal tools and weapons   
As Dimension Stone, Building houses or walls, Cement Manufacture, Cutting Tool, for Road Aggregate, Roadstone   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments   
Artifacts   

Other Uses
  
  

Commercial Uses
Cemetery Markers, Gemstone, In aquifers, In fire-starting tools, Jewelry, Manufacture of tools, Pebbles are used in ball mills to grind in ceramics industry, To determine the gold content of jewelry   
Blackboards, Manufacture of tools, Writing Slates   

Types

Types
Not Available   
Not Available   

Features
Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate   
Easily splits into thin plates, Smooth to touch   

Archaeological Significance
  
  

Monuments
Used   
Not Yet Used   

Famous Monuments
Data Not Available   
Not Applicable   

Sculpture
Not Yet Used   
Not Yet Used   

Famous Sculptures
Not Applicable   
Not Applicable   

Pictographs
Not Used   
Used   

Petroglyphs
Not Used   
Used   

Figurines
Not Yet Used   
Not Yet Used   

Fossils
Present   
Absent   

Formation

Formation
Novaculite forms when microcrystals of silicon dioxide grow within soft sediments that become limestone or chalk. The formation of Novaculite can be either of chemical or biological origin.   
Greenschist is medium grade metamorphic rock, formed by the metamorphosis of mudstone or shale, or some types of igneous rock, when it is subjected to higher temperatures and pressures.   

Composition
  
  

Mineral Content
Quartz, Silicon   
Alusite, Amphibole, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Serpentine, Sillimanite, Staurolite, Talc   

Compound Content
Ca, Silicon Dioxide   
CaO, Carbon Dioxide, MgO   

Transformation
  
  

Metamorphism
No   
No   

Types of Metamorphism
Not Applicable   
Not Applicable   

Weathering
No   
Yes   

Types of Weathering
Not Applicable   
Biological Weathering, Chemical Weathering   

Erosion
Yes   
Yes   

Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion   
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion   

Properties

Physical Properties
  
  

Hardness
7   
3.5-4   

Grain Size
Fine Grained   
Medium to Fine Coarse Grained   

Fracture
Conchoidal   
Conchoidal   

Streak
Colorless   
White   

Porosity
Less Porous   
Highly Porous   

Luster
Waxy and Dull   
Shiny   

Compressive Strength
450.00 N/mm2   
1
Not Available   

Cleavage
Non-Existent   
Slaty   

Toughness
1.5   
1.5   

Specific Gravity
2.5-2.7   
2.5-2.9   

Transparency
Translucent to Opaque   
Opaque   

Density
2.7 g/cm3   
2.8-2.9 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.74 kJ/Kg K   
19
Not Available   

Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant   
Impact Resistant, Pressure Resistant, Water Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Iran, Japan, Oman, Russia, Saudi Arabia, Taiwan, Thailand, Vietnam   
Afghanistan, Bangladesh, Bhutan, China, India, Japan, Kazakhstan, Malaysia, Pakistan, Russia, Thailand, Turkey, Vietnam   

Africa
Kenya, Morocco, South Africa, Tanzania   
Egypt, Ethiopia, Morocco, Nigeria, South Africa   

Europe
Austria, France, Greece, Italy, Malta, Poland, Portugal, Serbia, Spain, Sweden, United Kingdom   
Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland   

Others
Greenland, Mid-Atlantic Ridge   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, Mexico, USA   
Canada, Costa Rica, Cuba, Mexico, Panama, USA   

South America
Bolivia, Brazil   
Brazil, Colombia, Guyana   

Deposits in Oceania Continent
  
  

Australia
New South Wales, Queensland, South Australia, Western Australia   
New South Wales, New Zealand, Queensland   

Summary >>
<< Reserves

All about Novaculite and Greenschist Properties

Know all about Novaculite and Greenschist properties here. All properties of rocks are important as they define the type of rock and its application. Novaculite belongs to Sedimentary Rocks while Greenschist belongs to Metamorphic Rocks.Texture of Novaculite is Banded, Glassy, Rough, Vitreous whereas that of Greenschist is Foliated, Platy. Novaculite appears Glassy or Pearly and Greenschist appears Layered and Shiny. The luster of Novaculite is waxy and dull while that of Greenschist is shiny. Novaculite is available in black, brown, green, grey, red, white colors whereas Greenschist is available in dark greenish - grey, green colors. The commercial uses of Novaculite are cemetery markers, gemstone, in aquifers, in fire-starting tools, jewelry, manufacture of tools, pebbles are used in ball mills to grind in ceramics industry, to determine the gold content of jewelry and that of Greenschist are blackboards, manufacture of tools, writing slates.

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